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Name
  VY CMa  
AAVSO UID
000-BBM-990 (10922 observations)  
Constellation
Canis Major Sequence
J2000.0
07 22 58.33 -25 46 03.2  (110.74304 -25.76756) Search nearby
B1950.0 07 20 54.73 -25 40 12.1
Proper motion
RA: 5.72 +/- 2.01 mas/yDec: -6.75 +/- 4.47 mas/ySource: F. Van Leeuwen, 2007
Galactic coord. 239.353 -5.065
Other names

(Internal only)
AAVSO 0718-25 ADS 6033 A AN 60.1931
CD-25 4441 CPD-25 2286 HD 58061
HIP 35793 IRC -30087 RAFGL 1111
SAO 173591    
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Variability type
LC
Spectral type M5eIbp(C6,3)
Mag. range
6.5 - 9.6 V
Discoverer --
Epoch
--
Outburst --
Period --
Rise/eclipse dur. --
Remarks
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1 GCVS Team ADS 6033 A (B 9.2m, 0.5", 168deg; C 11.5m, 2.7", 291deg, D 11m, 2.9", 347deg, ...). H2O, OH, SiO maser. B - V: +2.3. In the region of the young open cluster NGC 2362. Embedded in a reflecting nebula. The companions may be details of the nebula; some of them are probably variable [W.H.van den Boss, BAN 3, 263, 1927., G.Wallerstein, PASP 70, 479, 1958.]. Surrounded by an envelope of gas and dust or a disk of 0.45" (lambda = 5 mkm) angular size. Secular decrease of brightness since 1801. Cyclic variations of brightness with Delta(m) from several tenths of a magnitude to 3m on time scale from 200d to 1900d. TiO and ScO emission bands in the spectrum. Spectroscopic studies [G.Wallerstein, PASP 70, 479, 1958., M.W.Feast, Obs 90, 24, 1970., G.H.Herbig, Lick Contr N302, 1970.].
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References
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1 L.J.Robinson, IBVS N599, 1971. 1971IBVS..599....1R
2 Sky and Tel 40, 330, 1970. --
External Links
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 2.82H = 1.58K = 0.29J - K = 2.53
APASS-DR9 B = 10.14V = 7.97B - V = 2.17
Images
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Supporting Documents
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Campaigns/Programs
 Binocular program
Revision History
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3 Otero, Sebastian Alberto 2011-11-09 05:27 UTC Standard type added.
2 Admin, VSX 2010-01-04 23:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.